"The resignation is a first sign of protest against elevation of communal Modi. The fire of protest will soon spread to others parts of the country," Bhattacharya told a party rally here.
"I feel sad for Advani, who along with Vajpayee had worked hard to establish the BJP. Today Advani has been sidelined. He has resigned from all posts of BJP," he added.
A founder member of BJP, 85-year-old Advani today resigned from the Parliamentary Board, National Executive and Election Committee.